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<title>MIH confirm messages must set the opcode to 0 (zero)</title>
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<a name="odtone.mihf_internals.mih_confirm_messages_must_set_the_opcode_to_0__zero_"></a><a class="link" href="mih_confirm_messages_must_set_the_opcode_to_0__zero_.html" title="MIH confirm messages must set the opcode to 0 (zero)">MIH
      confirm messages must set the opcode to 0 (zero)</a>
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<p>
        Chapter 7 of the MIH standard defines the primitives that should be supported
        by an implementation. These primitives show how a SAP can interact with a
        MIHF.
      </p>
<p>
        Chapter 8, of the same standard, defines the message MIH protocol messages
        for remote communications (communications between MIHFs).
      </p>
<p>
        The ODTONE implementation uses the messages defined on chapter 8 to implement
        the primitives of chapter 7.
      </p>
<p>
        Please note that the MIHF sends confirm messages to the MIH-Users and response
        messages to the remote MIHFs. The MIH protocol allocates 16 bits for the
        MIH message ID, where two of those bits are for the opcode. The opcode defines
        if a message is a request, response or indication. So, with 2 bits we can
        encode four values, where three are already taken. This leaves 1 available
        combination for the missing confirm primitives. Confirm primitives set the
        opcode to 0 (zero).
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